The U-2 Spy Plane is one of the most legendary and mysterious aircraft ever created — capable of flying at altitudes so high that the sky turns black and the curvature of Earth becomes visible. Built during the Cold War, this aircraft still operates today, collecting intelligence from 70,000 feet (over 21 km) above the ground — right at the edge of space.High-altitude reconnaissance aircraftNational origin United StatesManufacturer Lockheed Skunk WorksDesigner Clarence “Kelly” JohnsonPrimary users United States Air ForceCentral Intelligence Agency (historical)NASARepublic of China Air Force (historical)Number built :104Manufactured : 1955–1989Introduction date : 1956First flight. : 1 August 1955; 70 years ago